Practice portal › Nuclei › Mass-Energy and Binding Energy

The mass of proton, neutron and helium nucleus are respectively 1.0073 u, 1.0087 u and 4.0015 u. The binding energy of helium nucleus is

Asked in JEE Main 1st Feb 1st Shift 2023 · Mass defect and binding energy

(1) 14.2 MeV
(2) 7.1 MeV
(3) 56.8 MeV
(4) 28.4 MeV

Answer: (4) 28.4 MeV

Step-by-step solution

Δ m=2(1.0073+1.0087)-4.0015=0.0305 u

B=0.0305×931=28.4 MeV

Why the other options are wrong

(1) Halves the binding energy.
(2) Gives the binding energy per nucleon.
(3) Doubles the binding energy.

More Mass-Energy and Binding Energy questions

All Mass-Energy and Binding Energy questions →

Reading this solution needs no sign-in. You only sign in to practise against the clock and keep your progress.

Practise this with a timer